Publications

Publication Summary (list below): 

Google Scholar Citation Results: Total citations: 311 (November 2025), h-index: 9, i-10 index: 9. 

Google Scholar profile: https://scholar.google.co.in/citations?user=ZLJJxBQAAAAJ&hl=en

Rank-1 metric

• Our article is in the 99th percentile (within the top 1%, ranked 1,227th) of the 338,044 tracked articles of a similar age in all journals and the 99th percentile (ranked 1st) of the 39 tracked articles of a similar age in Nature Photonics. Link: https://www.nature.com/articles/s41566-023-01193-1

Selected for Research-Highlight 2016:

• Our work is selected as one of the important innovations of the year 2023 by Optica. It is scheduled to be published in OPN in the year 2023 in December.

• IEEE JLT 36 (13), 2582-2588 (2018). Link: https://opg.optica.org/jlt/abstract.cfm?uri=jlt-36-13-2582

• JOPT, IOP Sc., 18 (10), 105801, 2016. Link: 10.1088/2040-8978/18/10/105801 

Editor's choice/note: 

• A news article published on PhysicsWorld on our quantum photonic source is selected as Editor's choice. Link: https://physicsworld.com/a/entangled-light-source-is-fully-on-chip/   

• A news article published on Phys.org on our quantum photonic source is selected as Editors' note: https://phys.org/news/2023-04-quantum-source-fully-on-chip-scalability.html

Selected cover arts: Click on the image for full view and download.

Research highlights:

• JOPT, IOP Sc., 18 (10), 105801, 2016. Link: 10.1088/2040-8978/18/10/105801 

Served as Reviewer: 

A. Springer Nature: 

1. Nature Photonics (IF: 39.728), 

2. Nature Physics (IF: 20.03), 

3. Nature Communications (16.6),

4. Scientific Reports (3.8). 

5. Optical and Quantum Electronics (3.3), 

6. Silicon (2.8), 

7. Applied Physics B (2.0),

B. Americal Physical Society (APS) Journals: 

1. Physical Review Letters (IF: 9.161),

2. Physical Review Research (upcoming),

3. Physical Review X (IF: 15.76),

4. Physical Review A (IF: 3.14),

C. Optical Society of America (OSA) Journals: 

1. Applied Optics (IF: 1.791), 

2. Optics Express (IF: 3.561),

3. Photonics Research Journal (IF: 5.522),

4. JOSA A (IF: 1.861),

5. Optics Letter (IF: 3.56), 

6. Optica (IF: 8.4),

D. SPIE Journals:

1. Optical  Engineering (IF: 1.082),

2. Journal of Optical Microsystems (IF: 1.6),

E. Elsevier:

1. Optics Communications (IF: 1.887), 

F. IEEE Journals: 

1. IEEE Photonics Journal (IF: 2.627),

G. Multidisciplinary Digital Publishing Institute (MDPI):

1.  Micromachines (IF: 2.942),

2. Photonics (MDPI) (IF: 2.1), 

3. Applied Science (IF: 2.5), 

List of Publications (till Dec. 2023): 

Journal Publications (*corresponding author, †equal contribution), (grey text: under review)

Summary: Total 25, 22 peer-reviewed (published) journals, 3 under review 

2023

1. Robert Johanning, Raktim Haldar, Jan Heine, Philip Rübeling, Anahita K. Kashi, and Michael Kues, “Generation and Tomographic Reconstruction of Non-maximally Entangled Frequency-bin Encoded Quantum State,” in preparation

2. Surajit Bose, Ihar Babushkin, Stefanus Wijaya, Alí Angulo, Philip Rübeling, Raktim Haldar, Debashri Ghosh, Uwe Morgner, Ayhan Demircan, and Michael Kues, “Time reflection of single-photon coherent states and the quantum-classical correspondence principle,” under review.

3. Raktim Haldar*, Hatam Mahmudlu, Robert Johanning, Albert van Rees, Jörn P. Epping, Klaus-J. Boller, and Michael Kues, “Fully on-chip laser-integrated quantum source of entangled photon states,” accepted to the Optics & Photonics News in the Year 2023 (by Optica). 

4. Alí M. Angulo M., Jan Heine, Samuel Durán, Hatam Mahmudlu, Raktim Haldar, Charalambos Klitis, Marc Sorel, and Michael Kues, “Enhanced generation of photon pairs by multi-frequency excitation of an SOI integrated nonlinear resonator,” Optics Letter, vol. 48, no. 21, pp. 5583-5586 (2023). DOI: https://doi.org/10.1364/OL.503909. (IF: 3.56).

5. Lynn Sader, Surajit Bose, Anahita Khodadad Kashi, Yassin Boussafa, Raktim Haldar, Romain Dauliat, Philippe Roy, Marc Fabert, Alessandro Tonello, Vincent Couderc, Michael Kues, Benjamin Wetzel, “A new approach of Dispersive Fourier-transform: Ultra-sensitive characterization of noise-driven nonlinear dynamics,” ACS Photonics (2023). DOI: : https://doi.org/10.1021/acsphotonics.3c00711  (IF: 7.077).

6. Hatam Mahmudlu†, Robert Johanning, Anahita K. Kashi, Albert van Rees, Jörn P. Epping, *Raktim Haldar†, Klaus-J. Boller, and Michael Kues, “Fully on-chip photonic turnkey quantum source for entangled qubit/qudit state generation,” Nature Photonics, vol. 17, pp. 518-524 (2023) (†These authors share equal contributions). DOI: https://doi.org/10.1038/s41566-023-01193-1. (IF: 39.728).

2022

7. *Raktim Haldar, Robert Johanning, Philip Rübeling, Anahita K. Kashi, Thomas Bækkegaard, Surajit Bose, Nikolaj T. Zinner, and Michael Kues, “Steering of Quantum Walks through the Coherent Control of High-dimensional Bi-photon Quantum Frequency Combs with Tunable State Entropies,” ArXiv link: https://doi.org/10.48550/arXiv.2210.06305 (2022).

8. Hatam Mahmudlu†, Robert Johanning, Anahita K. Kashi, Albert van Rees, Jörn P. Epping, *Raktim Haldar†, Klaus-J. Boller, and Michael Kues, “Fully on-chip photonic turnkey quantum source for entangled qubit/qudit state generation,” ArXiv Link: https://doi.org/10.48550/arXiv.2206.08715. (†These authors share equal contributions)

9. Anahita K. Kashi, Lynn Sader, Raktim Haldar, Benjamin Wetzel, Michael Kues, “Frequency-to-Time Mapping Technique for Direct Spectral Characterization of Biphoton States From Pulsed Spontaneous Parametric Processes,” Frontiers in Photonics, vol. 3, no. 834065, March 2022. DOI: 10.3389/fphot.2022.834065. (IF: 3.7).

2021

10. Raktim Haldar, Sandeep Ummethala, Rajat Sinha, Shailendra K. Varshney, “Nested non-concentric microring resonators with high-Q and large fabrication tolerance,” accepted in Journal of Optical Society of America B, vol. 38, Oct. 2021. DOI: https://doi.org/10.1364/JOSAB.430789. (IF: 2.106).

2019

11. Raktim Haldar, A. Roy, P. Mondal, V. Mishra, Shailendra K. Varshney, "Free-carrier Driven Kerr Frequency Comb in Optical Micro-cavities: Steady-state, bistability, self-pulsation, and modulation instability," Phys. Rev. A, vol. 99, no. 033848, March 2019. DOI: https://doi.org/10.1103/PhysRevA.99.033848. (IF: 3.14).

12. Raktim Haldar, D. Barral, K. Bencheik, A. Levenson, N. Belabas, "Parallel Generation of Spatially Entangled Continuous Variable States in a 5×5 Periodically Poled LiNbO3 Waveguide Array," under preparation in J. of Sel. Topics in Quantum. Electron.

2018

13. Raktim Haldar, A. Roy, P. Mondal, V. Mishra, Shailendra K. Varshney, "Generalized Mathematical Formalism Governing Free-carrier Driven Kerr Frequency Comb in Optical Micro-cavities," arXiv Preprint arXiv: 1802.00391, 2018.

14. P. Mondal, R. Haldar, V. Mishra, S. K. Varshney, "All optical mode conversion and temperature sensing via transient-grating in step-index fiber," IEEE Photonics Technology Letters, 30 (24), 2175-2178, Nov. 2018. DOI: 10.1109/LPT.2018.2879975. (IF: 2.486).

15. A. Roy, R. Haldar, S. K. Varshney, "Robust, Synchronous Optical Buffer and Logic Operation in Dual-pump Kerr Micro-resonator," IEEE Journal of Lightwave Technology, vol. 36, no. 24, 5807-5814, Oct. 2018. DOI: 10.1109/JLT.2018.2878573. (IF: 4.439). 

16. Arkadev Roy, R. Haldar, and Shailendra K. Varshney, "Analytical Model of Dual-Pumped Kerr Micro Resonators for Variable Free Spectral Range and Composite Frequency Comb Generation," IEEE/OSA Journal of Lightwave Technology, vol. 36, no. 12, pp. 2422-2429, 2018. DOI: 10.1109/JLT.2018.2812900. (IF: 4.439). 

17. V. Mishra, R. Haldar, P. Mondal, and S. K. Varshney, "Efficient all-optical transistor action in short-length multi-mode optical fibers," IEEE Journal of Lightwave Technology, vol. 36, no.13, pp. 2582-2588, 2018. DOI: 10.1109/JLT.2018.2811805. (IF: 4.439). 

18. P. Mondal, N. Bhatia, V. Mishra, R. Haldar, S. K. Varshney, "Cascaded Raman and Intermodal Four-wave mixing in Conventional Non-Zero Dispersion Shifted Fiber For Versatile Ultra-Broadband Continuum Generation," IEEE/OSA Journal of Lightwave Technology, vol. 36, no. 12, pp. 2351-2357, 2018. DOI: 10.1109/JLT.2018.2809914. (IF: 4.439). 

2017

19. V. Mishra, S. P. Singh, R. Haldar, P. Mondal and S. K. Varshney, "Intermodal nonlinear effects mediated optical event horizon in short-length multimode fiber," Physical Review A, vol. 96, no. 013807, 2017. DOI: https://doi.org/10.1103/PhysRevA.96.013807. (IF: 3.14).

2016

20. Raktim Haldar, V. Mishra, A. Dutt, S. K. Varshney, "On-chip Broadband Ultra-Compact Directional Couplers and Polarization Splitters based on Off-centred and Non-Symmetric Slotted Si Wire Waveguides," Journal of Optics, IOP Science, vol. 18, no. 10, 105801, September 2016. DOI: 10.1088/2040-8978/18/10/105801. (IF: 2.516). 

21. V. Mishra, S. P. Singh, R. Haldar, and S. K. Varshney, "Sub-Wavelength Dual Capillaries-Assisted Chalcogenide Optical Fibers: Unusual Modal Properties in Mid-IR (2-5 um) Spectral Range," IEEE Journal of Selected Topics in Quantum Electronics, vol. 22, no. 2, p. 4401906, Mar-Apr, 2016. DOI: 10.1109/JSTQE.2015.2497335. (IF: 4.563). 

2015

22. G. T. Raja, R. Halder, and S. K. Varshney, "Numerical analysis of lasing characteristics in highly bend-compensated large-mode-area ytterbium-doped double-clad leakage channel fibers," Applied Optics, vol. 54, no. 35, pp. 10314-10320, Dec. 10, 2015. DOI: https://doi.org/10.1364/AO.54.010314. (IF: 1.905). 

2014

23.  R. Haldar, Abhik D. Banik, and Shailendra K. Varshney, "Design of CMOS compatible and compact, thermally-compensated electro-optic modulator based on off-axis microring resonator for dense wavelength division multiplexing applications," Opt. Express, vol. 22, no. 19, pp. 22411-22420, Sept. 2014. DOI: https://doi.org/10.1364/OE.22.022411. (IF: 3.833). 

2013

24. R. Haldar, S. Das, S. K. Varshney, "Theory and Design of Off-axis Microring resonators for on-chip photonics applications," IEEE Journal of Lightwave Technology, vol. 31, no. 24, pp. 3976-3986 Dec. 2013. DOI: 10.1109/JLT.2013.2278552. (IF: 4.439). 

25. Susobhan Das, R. Haldar and S. K. Varshney, "Triple-core Collinear and Non-Collinear Plasmonic Photonic Crystal Fiber Couplers," Applied Optics (AO), vol. 52, no. 34, pp 8199-8204, Nov, 2013. DOI: https://doi.org/10.1364/AO.52.008199. (IF: 1.905). 

Conference Proceedings:

Summary: Total 40, 37 international, 3 national (2 France, 1 India) conferences (published)

2024

1. Lynn Sader, Yassin Boussafa, Van-Thuy Hoang, Surajit Bose, Anahita Khodadad Kashi, Raktim Haldar, Bruno P. Chaves, A. Bougaud, Marc Fabert, Vincent Kermene, Alessandro Tonello, Vincent Couderc, Michael Kues, and Benjamin Wetzel, “Smart photonics: Characterization and control of modulation instability processes in nonlinear fiber optics,” SPIE Europe, Strasbourg, France 2024. URL: https://spie.org/conferences-and-exhibitions/photonics-europe/programme. (invited talk: upcoming) 

2. Raktim Haldar, Robert Johanning, Anahita K. Kashi, Hatam Mahmudlu, Philip Rübeling, Surajit Bose, Thomas Bækkegaard, Albert v. Rees, Jörn P. Epping, Nikolaj T. Zinner, Klaus-J. Boller, Michael Kues, “Controlled generation of photonic non-classical frequency combs for quantum information processing,” SPIE Photonics West, San Francisco, California, USA 2024. Upcoming. URL: https://spie.org/PWQ/conferencedetails/quantum-computing-communication-and-simulation#3008905. (invited: upcoming) 

3. Raktim Haldar, Hatam Mahmudlu, Robert Johanning, Anahita K. Kashi, Albert v. Rees, Jörn P. Epping, Klaus-J. Boller, Michael Kues, “Laser-integrated Entirely On-chip Turnkey Quantum Photonic Sources,” IEEE Workshop on Quantum Communication and Computing (QCom(P)), as a part of COMSNETS 2024, Bangalore, India, 2024. URL: https://www.comsnets.org/QCom(P).html. (invited talk: upcoming) 

2023

4. Surajit. Bose, Ihar Babushkin, Stefanus Wijaya, Alí M. Angulo M., Oliver Melchert, Philip Rübeling, Raktim Haldar, Debashri Ghosh, Uwe Morgner, Ayhan Demircan, and Michael Kues, “Manipulation of single-photon wavepackets via nonlinearity index fronts,” published in CLEO Europe/EQEC, 2023, Munich, Germany. (Paper ID: EE-5.2), DOI: https://doi.org/10.1364/CLEO_FS.2023.FTu3B.2. (oral) .

5. Hatam Mahmudlu, Raktim Haldar, Robert Johanning, Anahita Khodadad Kashi, Albert van Rees, Jörn P. Epping, Klaus-J. Boller, and Michael Kues, “Fully On-chip Laser-integrated Quantum Source of Entangled Photon States,” Invited to CLEO Europe/EQEC, 2023, Munich, Germany. DOI: https://doi.org/10.1109/cleo/europe-eqec57999.2023.10231960. (Invited) 

6. Lynn Sader, Van Thuy Hoang, Yassin Boussafa, Raktim Haldar, Vincent Kermene, Michael Kues, Benjamin Wetzel, “Modulation instability control via optical seeding and machine learning optimization,” CLEO Europe/EQEC 2023, Munich, Germany. (Paper ID: EF-10.4). DOI: https://doi.org/10.1109/cleo/europe-eqec57999.2023.10232691. (oral) 

7. Raktim Haldar, Hatam Mahmudlu, Robert Johanning, Anahita Khodadad Kashi, Albert van Rees, Jörn P. Epping, Klaus-J. Boller, and Michael Kues, “Fully On-chip Laser-integrated Entangled Photon Pair Source,” 24th European Conference on Integrated Optics (ECIO), 2023. (Invited) 

8. Surajit. Bose, Ihar Babushkin, Stefanus Wijaya, Alí M. Angulo M., Oliver Melchert, Philip Rübeling, Raktim Haldar, Debashri Ghosh, Uwe Morgner, Ayhan Demircan, and Michael Kues, “All-optical control of single-photon wavepackets via Kerr nonlinearity induced refractive index fronts,” CLEO USA 2023. (Paper ID: FTu3B.2). DOI: https://opg.optica.org/abstract.cfm?URI=CLEO_FS-2023-FTu3B.2. (oral) 

9. Alí M. Angulo M., Jan Heine, Samuel Durán, Hatam Mahmudlu, Raktim Haldar, Charalambos Klitis, Marc Sorel, and Michael Kues, “Tailoring photo pair emission characteristics via bi-chromatic excitation of an integrated nonlinear cavity,” Accepted to CLEO Europe/EQEC 2023, Munich, Germany. (Paper ID: CD-14.4), DOI: https://doi.org/10.1109/cleo/europe-eqec57999.2023.10232334. (oral) 

2022

10. Raktim Haldar, Hatam Mahmudlu, Robert Johanning, Anahita Khodadad Kashi, Albert van Rees, Jörn P. Epping, Klaus-J. Boller, and Michael Kues, “Fully On-chip Electrically-pumped Laser-integrated Two and High-dimensional Entangled Photon Pair Source,” oral presentation FiO/LS-2022, New York, USA. (Paper ID: FTh3E.6). Presentation video: https://www.youtube.com/watch?v=WFuHCpvKazg&ab_channel=RaktimHalder, DOI: https://opg.optica.org/abstract.cfm?uri=FiO-2022-FTh3E.6. (oral) 

11. Hatam Mahmudlu, Raktim Haldar, Robert Johanning, Anahita Khodadad Kashi, Albert van Rees, Jörn P. Epping, Klaus-J. Boller, and Michael Kues, “Fully on-chip photonic turnkey quantum light source of two- and high-dimensional entangled photons,” SPIE Photonics West 2023, San Francisco, USA. DOI: https://doi.org/10.1117/12.2648343. (oral) 

12. Raktim Haldar, Robert Johanning, Philip Rübeling, Anahita Khodadad Kashi, Thomas Bækkegaard, Surajit Bose, Nikolaj Thomas Zinner, and Michael Kues, “Unidirectional bosonic quantum walk and entanglement redistribution from high-dimensional quantum states with tunable entropies,” SPIE Photonics West 2023, San Francisco, USA. DOI: https://doi.org/10.1117/12.2650007. (oral) 

13. Lynn Sader, Raktim Haldar, Van Thuy Hoang, Michael Kues, Benjamin Wetzel, “Control of modulation instability control via optical injection,” JNOG – nonlinear effects in optical fibers and integrated optics organized by CNRS, 2022. (oral)

2021

14. Lynn Sader, Van Thuy Hoang, Raktim Haldar, Michael Kues, Benjamin Wetzel, “Modulation instability control via optical seeding,” GDR ELIOS – nonlinear effects in optical fibers and integrated optics organized by CNRS, 2021. (oral) 

15. R. Haldar, A. A. Martínez, H. Mahmudlu, P. Rübeling, C. Klitis, M. Sorel, M. Kues, “Multi-color Driven High-dimensional Bi-photon Quantum Frequency Combs: Versatile Joint Spectral Intensity with Tunable Entropies,” in Frontier in Optics and Laser Science (FiO/LS) 2021, Washington DC, USA. (Paper ID: JTh5A.130). DOI: https://doi.org/10.1364/FIO.2021. Paper ID: JTh5A.130. (poster: virtual) 

16. R. Haldar, P. Rübeling, A. K. Kashi, and M. Kues, "High-dimensional Bi-photon Quantum Frequency Combs with Tunable State Entropies," oral presentation in Advanced Photonics Congress 2021, Montreal, Canada. (Paper ID: ITh2A.5). DOI: https://doi.org/10.1364/IPRSN.2021.ITh2A.5. (oral: virtual) 

17. R. Haldar, A. K. Kashi, and M. Kues, "Steering of Quantum Walk through Coherent Control of High-dimensional Bi-photon Quantum Frequency Combs," CLEO-Europe, June 2021, Munich, Germany. DOI: 10.1109/CLEO/Europe- EQEC52157.2021.9541961. (Paper ID: CD 8.2). (oral: virtual) 

2019

18. Arkadev Roy, Raktim Haldar, and Shailendra K. Varshney, “Dual-pumped Kerr Cavity Soliton based Synchronous All-optical Buffer: Raman Resilience,” Integrated Nanophotonics Research, Silicon and Nanophotonics (IPR), California, USA (2019). (Paper ID: IT1A.3), URL: https://opg.optica.org/abstract.cfm?uri=iprsn-2019-IT1A.3. (oral) 

2018

19. R. Haldar, A. Roy, and S. K. Varshney, “Bistability and Self-pulsation in Free-carrier Driven Optical Microcavities with All Nonlinear Losses,” in the international IEEE conference ICEE, 2018, Bangalore. DOI: 10.1109/ICEE44586.2018.8937894. (oral) 

20. A. Roy, R. Haldar, and S. K. Varshney, “Breakdown of optical lattice formation in dual-pumped supercavity soliton states,” in SPIE, Europe, Strasbourg, France. (Paper ID: 10684-65). DOI: https://doi.org/10.1117/12.2306648. (poster) 

2017

21. A. Roy, R. Haldar, and S. K. Varshney, “Synchronous All-Optical Buffer-cum-Logic Gates in Dual-Pump Kerr Microring Resonators,” Frontiers in Optics and Laser Science (FiO/LS), Washington DC, USA, 2017. (Paper ID: JTu3A.22). DOI: https://doi.org/10.1364/FIO.2017.JTu3A.22. (poster) 

22. S. Bag, R. Haldar, M. Wan, and S. K. Varshney, “Fabrication and performance analysis of Mach-Zehnder Interferometer Coupled Polymer Micoring Resonator with Microfluidic Channel for Refractive Index Sensing,” Frontiers in Optics and Laser Science (FiO/LS), Washington DC, USA, 2017. (Paper ID: FW6C.3). DOI: https://doi.org/10.1364/FIO.2017.FW6C.3. (oral) 

23. R. Haldar, A. Roy, P. Mondal, V. Mishra and S. K. Varshney, “Analysis of Modulation Instability in Free-carrier Driven Microring Resonator Based Kerr Frequency Comb,” Frontiers in Optics and Laser Science (FiO/LS), Washington DC, USA, 2017. (Paper ID: JTu3A.13). DOI: https://doi.org/10.1364/FIO.2017.JTu3A.13. (poster) 

24. A. Roy, R. Haldar, and S. K. Varshney, “Implications of Self-Steepening in Temporal Tweezing of light for Optical Buffer Applications,” Frontiers in Optics and Laser Science (FiO/LS), Washington DC, USA, 2017. (Paper ID: JTu3A.24). DOI: https://doi.org/10.1364/FIO.2017.JTu3A.24. (poster) 

25. P. Mondal, N. Bhatia, V. Mishra, R. Haldar and S. K. Varshney, “Experimental Investigation of Cascaded Raman and Intermodal Nonlinear Interaction Based Supercontinuum Generation in Corning® LEAF® Fiber,” Frontiers in Optics and Laser Science (FiO/LS), Washington DC, USA, 2017. (Paper ID: JW4A.8). DOI: https://doi.org/10.1364/FIO.2017.JW4A.8. (e-poster) 

26. R. Haldar, P. Mondal, V. Mishra and S. K. Varshney, “Steady-state Solutions of Free-carrier Driven Normalized Mean-field Lugiato-Lefever Equation: Observation of Negative Kerr-tilts,” in ICO-24 (2017), Tokyo, Japan. (Paper ID: C000577). (oral) 

27. Partha Mondal, R. Haldar, V. Mishra, S. K. Varshney, “Broadband Cascaded Four-Wave Mixing and Parametric Gain in Dual-Slot, Ultra-flat Dispersion Si3N4/Si Waveguide,” in ICO-24 (2017), Tokyo, Japan. (oral).

28. R. Haldar, P. Mondal, V. Mishra and S. K. Varshney, “Stability Analysis and Bandwidth Estimation of Free-carrier Driven Kerr Frequency-combs,” CLEO-PR, 2017, Singapore. (Paper ID: s2572). DOI: 10.1109/CLEOPR.2017.811908675. (poster) 

2016

29. R. Haldar, P. Mondal, V. Mishra, S. K. Varshney, “Temperature-Insensitive Extremely Flat Dispersion in Highly-Nonlinear Si-Organic Hybrid Slot Waveguides,” in The International Conference on Fiber Optics and Photonics, IIT Kanpur, 2016. (Paper ID: Th3A. 13). DOI: https://doi.org/10.1364/PHOTONICS.2016.Th3A.13. (poster) 

30. P. Mondal, R. Haldar, V. Mishra, S. K. Varshney, “Pulse Width and Temperature Dependent Supercontinuum Generation in Silicaon Nitride Dual-Slot Waveguide with Ultralow Dispersion,” in The International Conference on Fiber Optics and Photonics, IIT Kanpur, 2016. (Paper ID: W3A.58). DOI: https://doi.org/10.1364/PHOTONICS.2016.W3A.58. (poster) 

31. V. Mishra, S. P. Singh, R. Haldar, P. Mondal, S. K. Varshney, “Pulse Splitting and Pulse-Locking Dynamics in Multi-Mode Optical Fibers,” in The International Conference on Fiber Optics and Photonics, IIT Kanpur, 2016. (Paper ID: W3A.90). DOI: https://doi.org/10.1364/PHOTONICS.2016.W3A.90. (poster) 

32. V. Mishra, S. Singh, R. Haldar, and S. K. Varshney, “Soliton-Mediated Dispersive Wave Reflection for Multimode Supercontinuum Generation,” in Frontiers in Optics and Laser Science (FiO/LS), Rochester, New York, USA, October, 2016. (Paper ID: JW2A.50). DOI: https://doi.org/10.1364/FIO.2016.JTh2A.50. (oral) 

33. R. Haldar, V. Mishra, C. Koos, W. Freude, S. K. Varshney, “Fabrication tolerant, Temperature Insensitive High-Q Single-bus Nested Off-axis Microring Resonators,” in Integrated Photonics Research (IPR), Vancouver, British Columbia, Canada, July, 2016. (Paper ID:  ITu1B.4). DOI: https://doi.org/10.1364/IPRSN.2016.ITu1B.4. (oral) 

2015

34. V. Mishra, S. P. Singh, R. Haldar and S. K. Varshney, “Nano-sized dual capillary assisted chalcogenide core optical fiber for flattened effective mode area in mid-IR,” in Frontiers in Optics and Laser Science (FiO/LS), San Jose, USA, October, 2015. (Paper ID: FM3G.6). DOI: https://doi.org/10.1364/FIO.2015.FM3G.6. (oral) 

35. R. Haldar, V. Mishra, Shailendra K. Varshney, “Ultra Compact Optical Switches and Polarization Splitter based on Non-Symmetric Slotted Si Wire Waveguides,” in Integrated Photonics Research (IPR), Boston, Massachusetts, USA, June, 2015. (Paper ID: JM3A.24). DOI: https://doi.org/10.1364/IPRSN.2015.JM3A.24. (oral) 

2014

36. R. Haldar, Abhik D. Banik, Sanathanan M. S., S. K. Varshney, “Compact Athermal Electro-optic modulator design based on SOI Off-axis Microring Resonator,” in CLEO, San Jose, CA, USA, June, 2014. (Paper ID: JW2A. 37). DOI: https://doi.org/10.1364/CLEO_AT.2014.JW2A.37. (poster) 

2013

37.  R. Haldar, Sanathanan M. S., Abhik D. Banik, S. K. Varshney,“Compact design of Athermal Electro-optic modulator based on SOI Off-axis Microring Resonator,” in International Workshop on Recent Advances in Photonics(WRAP), organized by Indian Institute of Technology, Delhi (IITD), Sponsored by OSA/IEEE Photonic Society, Dec. 2013. (oral) 

38. R. Haldar, S. Das and S. K.Varshney, “Theory and Design of Off-axis Microring Resonators based Compact Bandpass filter for On-chip Applications,” Frontiers in Optics and Laser Science (FiO/LS), Orlando, Florida, Oct. 2013. (Paper ID: FTh2E.5). DOI: https://doi.org/10.1364/FIO.2013.FTh2E.5. (oral) 

39. S. Das, D. Adhikari, R. Haldar, S. K. Varshney, “Analysis of Three Non-Collinear Cores Photonic Crystal FiberPlasmonic Coupler”, Frontiers in Optics and Laser Science (FiO/LS), Orlando, Florida, Oct. 2013. (Paper ID: FTu4D.8). DOI: https://doi.org/10.1364/FIO.2013.FTu4D.8. (oral) 

2011

40. S. Saha, R. Haldar, Sutasom Bhaumik and Dipanjan Ghosh, “Silence Removal and Voice Activity Detection (VAD) Algorithm for Speech Signal Processing,” in Forum of Scientists, Engineers and Technologists, FOSET, Kolkata, West Bengal, India (2011). (oral)